<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		div form{
	background-color: #800080;
}

div>form>input{
	border-radius: 10px;
    width: 800px;
    height: 40px;
}
div>input{
	border-radius: 10px;
    width: 800px;
    height: 40px;
}

	</style>
</head>
<body>
	<div>
		<form >
			<input type="text">
		</form>
	</div>
	<div>
		<input type="text">
	</div>
</body>
</html>